1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19c1b9f59501e1c0eb485adcfd05099632bac006cddbcb60e45f2e1f6da960f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21e502d4-adef-4591-bef2-93a16e84cd9e.json and https://artists.proofprofile.net/proofs/artist/21e502d4-adef-4591-bef2-93a16e84cd9e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef28a21212ed81da932f1a9d8bc816edfc242bd3d4c677f8db2b3624879a976. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB1588846 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8268a2be0616f587055e83fe8b6579fa1d9c103addc4b8e23bb4bd4a3de90583. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB1588847 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc518ab4ecc6e7a80286cea3c2524c02e23c9d6db2f5341d579ed521b23a118d7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB1588848 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4702a3e5f2736ab8499cf7bc64ab36c03d2d6f59b574e6d1c3a643661cd6ec7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB1588850 — a six-check JSON result.
Mother Goose Nursery Rhymes | Kids Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9b8a66b1e0fa236f60fea7ed372f7803c80604fcaa84e1e75b0e5ee39cf393. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB1595993 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9be43220d845fa6013fdf6f57e6b673c9f11f9d93242d4a0e187ee033edad8c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB1595995 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c23069f15469b48e0af473e8a9ae91eed3512043e3a9244aee1d05e4f7f248. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC1561714 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8dc5a396452660b92fa88adc62b0a27cfe6b63cd0cd09b8bbcb5b2dd1636f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC1561727 — a six-check JSON result.
みんなでうたおう！童謡・手遊び歌
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a72937bb013fefdb1147b610ca5e2dc6bbe3403d2d1f26a67c1eefce0d9cb3c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC1561725 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1ff5b747d7288462f1ee212248e13e5c11c053a2813f3a1fdfd7e1313a4b5f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC1561738 — a six-check JSON result.
japanese kids & Baby songs (Teasobi songs)
Mother Goose Nursery Rhymes for kids & baby sing! (kids song best collection)
赤ちゃん幼児向け 楽しい手遊び歌
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf673a605ac6c569f4ce6a1f7c544775895d250ab869678b240a6d910a106d8. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPD1529785 — a six-check JSON result.
japanese songs for kids & Baby (Teasobi songs)
親子で楽しく手遊び歌 [2] (赤ちゃん・幼児 [保育園・幼稚園] 向け)
赤ちゃん幼児向け 楽しい手遊び歌 [3]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a318a9031a6e211a367b7660bc5313a13589a6d6fd603f78d482f57187a55e5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPD1669128 — a six-check JSON result.
japanese kids & Baby songs3 (Teasobi songs)
みんなで歌おう 懐かしの童謡・唱歌 [1]
みんなで歌おう 懐かしの童謡・唱歌 [2]
素敵なホリデーソング (子供向けの楽しい英語の歌)
「おやすみのうた」赤ちゃんもぐっすり安眠・夜泣き対策
オルゴール童謡 ～心安らぐ優しい音色～
しゃぼんだま【オルゴール】（インストゥルメンタル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0182152959a668009d6587d2bfcc2765a4a1d1a3eace91117f0d12a545786a81. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPE1615946 — a six-check JSON result.
童謡手遊び歌「鬼のパンツ」がいっぱい！
童謡手遊び歌「アルプス一万尺」がいっぱい！
お誕生日の歌「ハッピーバースデーソング（Happy birthday to you）」がいっぱい！
ハッピーバースデーソング - インストゥルメンタル - Ver. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ebf0a2cc39e90cd7c2c67da8bf600d2d052ec6b9749df2af69bfc2cb1d85da. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1723845 — a six-check JSON result.
ハッピーバースデーソング - インストゥルメンタル - Ver. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb679ff5890a60562975c6efe46b109e507b8494e15ffe6d0776e76f506868e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1723846 — a six-check JSON result.
ハッピーバースデーソング - インストゥルメンタル - Ver. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56355cd9630d435baf8cc46e2669d767a0d7a31244ec2939d2596832df4a88fd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1723847 — a six-check JSON result.
ハッピーバースデーソング (アカペラ) - お姉さん Ver. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7dd018b4bf9d68cbccbd616f0a4b8efb9a732f3e537f74a88fd92d89663b80. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1723849 — a six-check JSON result.
ハッピーバースデーソング (アカペラ) - お姉さん Ver. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc2fc675b102d9700ff1572647a8b779893bd437ea52ecbe84eb3d4529910f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1723850 — a six-check JSON result.
ハッピーバースデーソング (アカペラ) - 子ども Ver
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fc53e8b8f17fe3647af6d217371ef689b1eb299b73be6624bb92ccde8d70c1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1723851 — a six-check JSON result.
ハッピーバースデーソング (アカペラ) - 外国人 Ver
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb5e648398a3958241ad0b424cf61f76c8e6e3518bb0ffdf60015757c4b14a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1723852 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe220e86fd9b3f1ef6ba94c367944bad8da862f83b9d6c7f3fa55616ea6a5096. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPG1892290 — a six-check JSON result.
みんなで歌おう！ピアノ弾き語り童謡
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6251bd09a544a825fc1c2554755664c5c9a50db375aefd72b2fc66aa13ef0523. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPH1829446 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391f8bf99e58826c67727afb607e84ae93ddddf5ba3d113d0de0c95de5861d06. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPH1829448 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df4d80ad8f51dbd9af28ff1cdef6ee4cf6821e14ce83adf833ccd6cf50d0f43. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPH1829450 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de800b8f0eb4ddf2372f2d155f424282d3c4238014ef0a35674dde95c6f7ff. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPH1829454 — a six-check JSON result.
みんなで歌って踊ろう！ピアノde手遊び歌
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151c7bb0d6e35df3e436338e96f90705b28e98130e2628a522bf66bf620b758c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPJ1917700 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42430c8f5a38f05550373a390951531c674ad2f706236be33f07989709450285. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPJ1986284 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cbe245623c86d3fcef9e68a6337ed5e22f377a83e11d18d81d216d87ab55f0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPJ1986296 — a six-check JSON result.